Sound reproducer for high definition television

A sound reproducer for a Hi-vision (high definition television) system comprising:

• surround sound processor means for converting sterophonic audio signals in two channels, a right and a left channel, into front right, left and center channel audio signals in front of a user of the system, and into monaural rear right and left channel audio signals to the rear of said user;
• first and second power amplifier means for amplifying the right and left front audio signals;
• first through third sound volume control means for controlling values of the center front audio signal and right and left rear audio signals;
• fourth and fifth sound volume control means for controlling values of the center front audio signal and monaural right and left rear audio signals;
• first through third switching means for switching outputs of the first through third sound volume control means with that of the fourth and fifth sound volume control means;
• and
• third through fifth power amplifier means for amplifying the center front audio signal and the right and left rear audio signals fed from the first through third switching means,
• wherein when reproducing audio signals of a Hi-vision 3-1 sound system, outputs of the fourth and fifth sound volume control means are selected by the first through third switching means while, when reproducing audio signals of the two-channel sound surround system, outputs of the first through third sound volume control means are selected by the first through third switching means.